/Engine/Plugins/Developer/Concert/ConcertMain/Source/ConcertServer/Public/IConcertServer.h
Gets all remote admin endpoint IDs. A remote admin endpoint is not connected to any session and communicating with the server otherwise, e.g. discovering sessions.
[TArray](API\Runtime\Core\Containers\TArray)< [FConcertEndpointContext](API\Plugins\ConcertTransport\FConcertEndpointContext) > GetRemoteAdminEndpoints() const